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Knowledge organization
A field of study invloving the indexing and classification of knowledge that is usually performed in libraries, databases and archives etc. It is related to Library and Information Science(LIS).
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cytopyge
Biology; Parasitology
In Balantidium and some other ciliates, the permanent opening in the ectoplasm through which the residue of digestion of food materials is discharged (anal opening). In other ...
cytostomal flagellum
Biology; Parasitology
In Chilomastix, a flagellum that lies in a grove behind the cytostome (usually within the cytopharynx) and directs solid food particles to the posterior end where food vacuoles ...
cytostome
Biology; Parasitology
In some protozoa, especially flagellates and ciliates, the cavity that opens by way of the peristome (the lips) to allow solid food particles to enter (the mouth). In some ...
dead-end host
Biology; Parasitology
One in which the parasite reaches an end point and is unable to continue its life cycle (see aberrant host).
onchosphere
Biology; Parasitology
The stage that escapes from the egg shell and later from the embryophore of tapeworms. In human tapeworms it is a six-hooked (hexacanth) embryo.
oocyst
Biology; Parasitology
The stage of a coccidian protozoa that is evacuated with the feces. Sporocysts develop within the oocyst and, as the oocyst matures, sporozoites develop within sporocysts (except ...
operculum
Biology; Parasitology
Eggs of some trematode and cestode helminths have a cap-like structure at one end through which the embryo (larva) emerges. Protrusions surrounding the base of the operculum, ...
